CN104885008B - Projection-type image display device - Google Patents
Projection-type image display device Download PDFInfo
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- CN104885008B CN104885008B CN201380067740.0A CN201380067740A CN104885008B CN 104885008 B CN104885008 B CN 104885008B CN 201380067740 A CN201380067740 A CN 201380067740A CN 104885008 B CN104885008 B CN 104885008B
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- shaped lens
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- projection
- light
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/0095—Relay lenses or rod lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0093—Means for protecting the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
- H04N5/7441—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2026—Gas discharge type light sources, e.g. arcs
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Planar Illumination Modules (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
It is an object of the invention to, it is provided that even if being also suitably for the structure of rod-shaped lens and the projection-type image display device being provided with this rod-shaped lens installed in the optical system of illuminated very strong light.The present invention is a kind of projection-type image display device, possessing the cross section of the incident white light from described light source and the injection scattered light of uniform-illumination is square rod-shaped lens, described rod-shaped lens possesses: only a pair of rod (31,32), by being formed along optical axis segmentation in the way of being divided into two on the long limit of its square-section by described rod-shaped lens, and define thin film in a part for the periphery in mutually opposing face；And cap (40), covering the periphery of the pair of rod, the described thin film remaining this pair rod by being formed on mutually opposing face is opposed somewhat separatedly, and is formed with peristome at light incident side and the emitting side of described rod-shaped lens.
Description
Technical field
The present invention relates to projection-type image display device, particularly relate to the optical element being configured between from its light source portion to liquid crystal display cells.
Background technology
Projection-type image display device is known already by following patent documentation 1 etc., white light from light source is carried out optically focused and forms light-emitting area by this projection-type image display device, the rotary-type color filter of configuration near this light-emitting area, injection light from this color filter is carried out optically focused and is incident to an optical modulation element, this optical modulation element the image formed is projected on screen by projection lens.In addition, in this projection-type image display device (or liquid crystal indicator), in order to make the light from light source be irradiated to efficiently on the viewing area of display floater, the square rod-shaped lens adopting cross sectional shape to be the viewing area similar shape with display floater, make its light source portion short to the optical path length of image display element, the miniaturization overall in order to realize device, being made up of the aggregation of the segmentation rod being divided into multiple (4) centered by its optical axis by rod-shaped lens, this is also known already by following patent documentation 2.
Prior art literature
Patent documentation
Patent documentation 1: specially permit No. 4716528
Patent documentation 2: Unexamined Patent 9-222603 publication
Summary of the invention
The problem that invention to solve
Namely, in order to obtain the effect of sufficient Illumination Distribution in rod-shaped lens, need to make its length relative to cross sectional shape while becoming the multiple of the value of regulation, therefore, when due to adopt large-scale display floater etc. and when the cross section of rod-shaped lens becomes big, its length also becomes big, therefore, there is the problem that device entirety maximizes, but according to the rod-shaped lens that the aggregation by 4 segmentation rods disclosed in above-mentioned patent documentation 2 is constituted, its length will not be made to become big and be capable of the miniaturization that device is overall, but, as following also describe, wherein for projection-type image display device, especially along with the installation constitution in the optical system of substantial amounts of heating, do not consider fully.
Therefore, the present invention completes in view of the projection-type image display device based on above-mentioned prior art, its object is to, it is provided that be actually suitable for the structure of rod-shaped lens and the projection-type image display device being provided with this rod-shaped lens being arranged in projection-type image display device.
For solving the means of problem
In order to solve above-mentioned problem, according to the present invention, it is provided that a kind of projection-type image display device, possess: light source, radiate white light；Cross section is square rod-shaped lens, the incident white light from described light source and the injection scattered light of uniform-illumination；Optical modulation element, is arranged near the outgoing plane of described rod-shaped lens, is modulated according to picture signal as incident illumination by the light penetrated from this rod-shaped lens, forms show image；And projection lens, show image after being modulated by described optical modulation element is amplified projection, this projection-type image display device is characterised by, described rod-shaped lens possesses: only a pair of rod, described rod-shaped lens is formed along optical axis segmentation in the way of being divided into two on the long limit of its square-section, and defines thin film in a part for the periphery in mutually opposing face；And cap, cover the periphery of the pair of rod, this pair rod is remained and is somewhat separated by the described thin film being formed on mutually opposing face and opposed, and be formed with peristome at light incident side and the emitting side of described rod-shaped lens.
Invention effect
According to the above-mentioned present invention, play following excellent effect: even if providing the rod-shaped lens being also suitably for installing in the increase of the luminous intensity along with light source in recent years in the optical system of illuminated very strong light and the structure of the projection-type image display device being provided with this rod-shaped lens.
Accompanying drawing explanation
Fig. 1 indicates that vertical view and the side view of an example of the major part structure of the projection-type image display device of one embodiment of the present invention.
Fig. 2 is the axonometric chart of the partial cross section of the detailed configuration comprising the rod-shaped lens portion represented in above-mentioned projection-type image display device.
Fig. 3 indicate that the master of the structure of a pair rod constituting above-mentioned rod-shaped lens portion look, side-looking, rearview.
Fig. 4 is the part amplification stereogram of the bonding part comprising above-mentioned a pair rod.
Fig. 5 indicates that above-mentioned rod-shaped lens portion and the figure to the position relationship between its cap kept.
Detailed description of the invention
Hereinafter, the embodiment that present invention will be described in detail with reference to the accompanying.
First, Fig. 1 indicates that top view (Fig. 1 (A)) and the side view (Fig. 1 (B)) of an example of the major part structure of the projection-type image display device of one embodiment of the present invention, at this, in the various figures, local right hand rectangular coordinate system is imported.That is, in Fig. 1 (A), the length direction of multipath reflection element (rod-shaped lens) is set to Z axis, in the face orthogonal with this Z axis, the axle parallel with paper is set to X-axis, and Y-axis will be set to from outside axle in this paper.Additionally, in Fig. 1 (B), the axle parallel with described paper is set to Y-axis in the face orthogonal with above-mentioned Z axis, and X-axis will be set to from this paper axle outside to inside.That is, Fig. 1 (A) is the top view watching projection-type image display device from Y direction, and Fig. 1 (B) is the side view watching projection-type image display device from X-direction.
In these figures, discharge lamp 1 and reflector 2 constitute the light source for radiating white light.It addition, as discharge lamp 1, for instance extra-high-pressure mercury vapour lamp etc. can be used.That is, extra-high-pressure mercury vapour lamp radiates white light efficiently, and its brightness (intensity) is very high, its radiating light can by the minute surface of the reflector 2 excellent as light-gathering optically focused efficiently.More specifically, this reflector 2 is constituted by by the ELLIPTIC REVOLUTION face that the ellipse (but being semicircle) with the first focus (short focus) and the second focus (focal length point) rotates, within it on surface, it is formed with transmission infrared ray and reflects dielectric multilayer film of visible ray efficiently, the visible ray component among the light from discharge lamp 1 radiation being arranged in the first focus (short focus) is reflected to the second focus (focal length point).
Additionally, the rear of the Z-direction at above-mentioned light source, it is configured with the multipath reflection element as converging optical element and rod-shaped lens 3, is caught and optically focused by reflector 2 from the light of above-mentioned discharge lamp 1 injection, be incident to rod-shaped lens 3.About this rod-shaped lens 3, its structure is described below, but near the position of the second focus (focal length point) that its plane of incidence (left part of figure) is arranged in above-mentioned off-axis paraboloids and ellipsoids mirrors 2, the visible ray component optically focused namely reflected by reflector, and its outgoing plane becomes shape long and short in the Y-axis direction in the X-axis direction, its length-width ratio is set to identical with the length-width ratio as the reflection-type image display element 10 of optical modulation element described below.Namely, if the length of the X-direction of the outgoing plane of rod-shaped lens 3 is set to " C ", the length of Y direction is set to " D ", the length of the X-direction of reflection-type image display element 10 is set to " E ", the length of Y direction is set to " F ", then meets C/D=E/F.Thus, in rod-shaped lens 3, the light of multiple reflections becomes the light distribution of similar to liquid crystal reflective image display element 10 and uniform intensity on its outgoing plane.
Additionally, in this example, near the outgoing plane of rod-shaped lens 3, it is configured with revolving color filter and colour wheel (colorwheel) 4.This colour wheel 4 be by respectively only the color filter of the transmission-type of 6 kinds of fan-shapeds of the light of transmission R (red), G (green), B (indigo plant), C (green grass or young crops), Y (Huang), W (in vain) configure on circumference (rotation) direction in order and constitute and can carry out the discoid color filter of its Spin Control.Additionally, replace the color filter of 6 above-mentioned kinds, the color filter of 3 kinds being made up of R (red), G (green), B (indigo plant) also is able to realize this colour wheel 4.
Namely, by rotating above-mentioned colour wheel 4, thus be decomposed into the light of 6 colors (R (red), G (green), B (indigo plant), C (green grass or young crops), Y (Huang), W (in vain)) with sequential from the white light of light source injection.Afterwards, from the light of this colour wheel 4 injection via the relay lens (relaylens) 5～8 constituting the light optics key element that this injection light is carried out optically focused, and then via TIR prism 9, it is irradiated on reflection-type image display element 10.
At this, narration constitutes the effect of relay lens 5～8 of above-mentioned light optics key element, and these relay lenses are to penetrating from rod-shaped lens 3 and the light of transmission colour wheel 4 carries out optically focused, thus playing the effect dispersed preventing light.Additionally, relay lens plays, and light uniform on the outgoing plane of colour wheel 4 is distributed on the face of reflection-type image display element 10 effect being amplified.And then, relay lens has the effect almost parallel so that light.Further, TIR prism 9, by incident light total reflection, is directed into reflection-type image display element 10.
Reflection-type image display element 10 is able to control the optical modulation elements of 2 dimensions of unit (cell), these unit the image formed, via projecting lens 11, is exaggerated and projects on such as screen etc..
This reflection-type image display element 10 is by controlling device (such as, it is made up of microcomputer or memorizer), obtain synchronization with the rotation of above-mentioned colour wheel 4, thus, show the image based on picture signal by every kind of coloured light of colour wheel 4, and will reflect to the direction of projecting lens 11 from the light of TIR prism 9 incidence.That is, reflection-type image display element 10 light after reflecting becomes the angle of the angle of total reflection being unsatisfactory for TIR prism 9, so transmission TIR prism 9, is incident to projecting lens 11.It addition, this, transmission TIR prism 9 after light is penetrated colour wheel 4 and arrive the optical system on the surface of reflection-type image display element 10 and be called lamp optical system.
It follows that the details of above-mentioned rod-shaped lens 3 is described referring to accompanying drawing 2～5.
In recent years, in order to promote the brightness of projection picture thus improving display performance, the luminous intensity of light source increases, but, it is accompanied by this, in the optical system of illuminated very strong light, the particularly incident rod-shaped lens penetrating the scattered light of uniform-illumination from the white light of light source, it is necessary to for the countermeasure of the very high radiating light of this intensity.Additionally, be also carried out narration in the above prior art, in addition it is also necessary to make the countermeasure that rod-shaped lens (particularly, its length direction) maximizes for the maximization with the display panels as optical modulation element.
Therefore, inventors etc. have attempted various research, learn as illustrated in above-mentioned patent documentation 2, when rod-shaped lens is formed by 4 the excellent aggregations formed in the way of by its cross section quartering, the binding agent being applied on composition surface to engage these 4 rods is exposed under high heat thus worsening, cause the fault etc. of device, become the major reason making life of product shorten.
Therefore, the present invention completes particularly in view of problem when being actually installed in projection-type image display device, it is provided that with the installation constitution of the rod-shaped lens in the optical system of substantial amounts of heating.
Fig. 2 is the axonometric chart comprising the integrally-built partial cross section for representing above-mentioned rod-shaped lens 3, according to this figure, its plane of incidence (left side of figure) is formed as such as square by rod-shaped lens 3, to carry out optically focused efficiently to from the circular incident illumination of common light source radiation, and its outgoing plane is formed as rectangle as described above in the way of identical with the length-width ratio of the reflection-type image display element 10 as optical modulation element.
Further, rod-shaped lens 3 by by the rectangular cross-sectional of its emitting side on its long limit in the way of in the of two points, 2 (only a pair of) rod 31 and 32 formed by splitting either longitudinally or along optical axis is constituted.It addition, the front view of the light incident side of this pair rod 31,32 of composition rod-shaped lens 3 is such as shown in accompanying drawing 3 (A), shown in its side view such as Fig. 3 (B), and shown in the rearview of its emitting side such as Fig. 3 (C).
Additionally, this pair rod 31,32 is parallel to each other the state that the mutually opposing face extended in the direction of the optical axis is somewhat separated by the thin film on the following surface also described or the following structure of cap 40 to be retained as.Thus, forming very thin air layer between a pair rod 31,32, the light propagated in each rod reflects as in the boundary face of division surface at these, therefore, it is possible to be reliably separated between these rods 31,32.
Namely, accompanying drawing 4 is the axonometric chart shown in part amplification of the bonding part by above-mentioned a pair rod 31,32, according to this figure also it will be apparent that, a pair rod 31,32 opposed faces a side face a part (corner), more specifically form the corner of the square corner of opposed faces, thin film 33 (such as, thickness (d=5～20 μm) of such as Si or metallic film (Ti, Mg etc.) etc. are formed by vacuum evaporation etc..That is, by forming this thin film 33 in a part for opposed faces, a pair rod 31,32 is retained as with the state somewhat separated and is parallel to each other.Obviously, smooth (plane) degree on the composition surface of rod 31,32 is more high, and the thickness of this thin film can be more little.
And then, again return to above-mentioned Fig. 2, above-mentioned cap 40 possesses the outer wall 41 (only illustrating 2 faces in the drawings) of 4 arranged in the way of covering above-mentioned a pair rod 31,32, is arranged in light source side (namely, light incident side) the frame portion 42 with peristome, be arranged in the frame portion 43 with peristome of emitting side (that is, reflection-type image display element side) and also have and highlight, from the inner face of this outer wall, the multiple frame portions formed for frame-shaped.It addition, the frame portion 42 being arranged in light incident side has the function of the aperture of the incident illumination to rod-shaped lens 3 circular as the cross section from light source side.Additionally, multiple holding frame portions 44 that are prominent from the inner face of outer wall 41 and that formed are formed respectively in the way of the periphery of its leading section with a pair rod 31,32 contacts and its front end attenuates.That is, a pair rod 31,32 is thus maintained at the position of regulation by linear contact lay by multiple holding frame portions 44 from its periphery.
In above-mentioned Fig. 4 and then Fig. 5, it is shown that the front of above-mentioned a pair rod 31,32 and be arranged in above-mentioned cap 40 light source side (light incident side) frame portion 42 between position relationship.Namely, according to figure also it will be apparent that, in the peristome side from cap 40 (in figure shown in dotted line) (namely, frame portion 42 via above-mentioned light incident side) viewing rod-shaped lens 3 when, the thin film 33 formed in the opposed faces of this pair rod 31,32 is blocked (that is, the outside being positioned at this peristome) by this frame portion 42.Accordingly, will not shine directly at the thin film 33 formed on the position of its plane of incidence from light source radiation by the very strong light of reflector optically focused, therefore, it is possible to prevent from causing plant failure thus also resulting in the situation that life of product shortens owing to this thin film 33 is exposed to deterioration caused under high heat.It addition, this cap 40 can be fabricated to above-mentioned shape by casting the such as metal such as aluminum (Al) or magnesium (Mg).
That is, according to above-mentioned the present embodiment, it is provided that even if the optical system of illuminated very strong light is also suitably for the structure of rod-shaped lens and the projection-type image display device being provided with this rod-shaped lens installed in the increase of luminous intensity of adjoint light source in recent years.More specifically, even if the situation becoming the reflection-type image display element of 1.0 inches of sizes at the reflection-type image display element (ratio=4:3) making the conventional 0.7 inch of size in diagonal angle or the reflection-type image display element (ratio=16:9) making conventional 0.53 inch of size become the reflection-type image display element of 0.97 inch of size, when namely increasing the cross section of rod-shaped lens, without increase this rod-shaped lens length (namely, maximize), even length as in the past also be able to obtain to have sufficient Illumination Distribution (namely, injection light uniformly).
Additionally, in the projection-type image display device of embodiments of the present invention described in detail above, describe as reflection-type image display element, adopt the structure being used for being formed the optical modulation element of desired image by the white light from colour wheel 4, but the present invention is not limited to this, replace in this, various projection-type image display device can also be applied to, such as, can also use as strong dielectric liquid crystal panel and the liquid crystal panel to the bistable element that ON/OFF the two state switches over, additionally, now, the TIR prism 9 of illumination optical system uniform part need not be constituted.Additionally, in above-mentioned projection-type image display device, as revolving color filter and colour wheel 4, describe the color filter being made up of the color filter of multiple transmission-types, but the present invention be not limited to this, replace in this, for instance the color filter of reflection-type can also be used.
It addition, the present invention is not limited to the above embodiments, also comprise various variation.Such as, the above embodiments are for ease of understanding to illustrate that the present invention describes the embodiment of details, are not limited to possess illustrated entire infrastructure.Furthermore it is possible to a part for the structure of certain embodiment to be replaced into the structure of other embodiments, additionally it is possible to the structure of certain embodiment to be added the structure of other embodiments.Additionally it is possible to a part for the structure for each embodiment, add other structures, it is deleted, replaces.
Description of reference numerals
1 ... discharge lamp, 2 ... reflector, 4 ... colour wheel, 5～8 ... relay lens, 9 ... TIR prism, 10 ... reflection-type image display element, 11 ... projecting lens, 3 ... rod-shaped lens, 31,32 ... rod, 33 ... thin film, 40 ... lid (cover) portion, 41 ..., 42,43 ... frame portion, 44 ... holding frame portion.
Claims (3)
1. a projection-type image display device, possesses:
Light source, radiates white light；
Cross section is square rod-shaped lens, the incident white light from described light source and the injection scattered light of uniform-illumination；
Optical modulation element, is arranged near the outgoing plane of described rod-shaped lens, is modulated according to picture signal as incident illumination by the light penetrated from this rod-shaped lens, forms show image；And
Projection lens, is amplified projection to the show image modulated by described optical modulation element；
Described projection-type image display device is characterised by,
Described rod-shaped lens possesses:
Only a pair of rod, by being formed along optical axis segmentation in the way of being divided into two on the long limit of the square-section of this rod-shaped lens by described rod-shaped lens, and is formed with thin film in a part for the periphery in mutually opposing face；And
Cap, covers the periphery of the pair of rod, by this pair rod by the described thin film formed on mutually opposing face opposed somewhat separatedly in the way of keep this pair rod, and be formed with peristome at light incident side and the emitting side of described rod-shaped lens；
Described cap possesses:
Outer wall, covers the periphery of the pair of rod；And
Multiple holding frame portions, highlight with frame-shaped from the inner face of this outer wall, and abut with the periphery of the pair of rod；
And then, the described thin film that the peristome of the light incident side of described cap is formed in the opposed faces of the pair of rod observing rod-shaped lens from this peristome side when is formed as square in the way of being positioned at the outside of this peristome.
2. projection-type image display device according to claim 1, it is characterised in that
Form the described thin film on the opposed face of described only a pair of rod constituting described rod-shaped lens, formed in the corner of the excellent opposed faces of a side of described only a pair of rod.
3. projection-type image display device according to claim 2, it is characterised in that
Described thin film is formed by Si or metallic film.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2013/059549 WO2014155675A1 (en) | 2013-03-29 | 2013-03-29 | Projection image display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104885008A CN104885008A (en) | 2015-09-02 |
| CN104885008B true CN104885008B (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380067740.0A Active CN104885008B (en) | 2013-03-29 | 2013-03-29 | Projection-type image display device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9519205B2 (en) |
| EP (1) | EP2985656B8 (en) |
| JP (1) | JP6012850B2 (en) |
| CN (1) | CN104885008B (en) |
| WO (1) | WO2014155675A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150094403A (en) * | 2014-02-11 | 2015-08-19 | 삼성전자주식회사 | Rod lens for lighting apparatus and lighting apparatus comprises the same |
| US10237524B2 (en) * | 2016-08-05 | 2019-03-19 | Panasonic Intellectual Property Management Co., Ltd. | Lighting device and projection display apparatus using the same |
| US11988375B2 (en) | 2019-11-14 | 2024-05-21 | Nichia Corporation | Light source unit, light source module, and lighting device |
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| CN102692757A (en) * | 2011-03-25 | 2012-09-26 | 精工爱普生株式会社 | Liquid crystal device and projector |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9519205B2 (en) | 2016-12-13 |
| WO2014155675A1 (en) | 2014-10-02 |
| EP2985656A4 (en) | 2016-09-21 |
| JPWO2014155675A1 (en) | 2017-02-16 |
| EP2985656A1 (en) | 2016-02-17 |
| EP2985656B8 (en) | 2018-03-21 |
| US20160085142A1 (en) | 2016-03-24 |
| JP6012850B2 (en) | 2016-10-25 |
| EP2985656B1 (en) | 2018-02-14 |
| CN104885008A (en) | 2015-09-02 |
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